#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
//获得月份天数
int main()
{
	int year = 0;
	int month=0;
	while (scanf("%d %d",&year,&month) != EOF)
	{
		switch (month)
		{
		case 2:
			if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0))
				printf("28\n");
			else
				printf("29\n");
			break;
		case 1:
		case 3:
		case 5:
		case 7:
		case 8:
		case 10:
		case 12:
			printf("31\n");
			break;
		default:
			printf("30\n");
			break;
		}

	}
}